Add labelfunc option to dotprint
Add labelfunc option to dotprint

This determines how the labels of the leaves are printed. By default, it is
str, but another good choice is srepr.  This does not affect the printing of
non-leaves.

lindsayad/sympy,ahhda/sympy,sunny94/temp,sahilshekhawat/sympy,meghana1995/sympy,Vishluck/sympy,Mitchkoens/sympy,Titan-C/sympy,maniteja123/sympy,grevutiu-gabriel/sympy,MridulS/sympy,jamesblunt/sympy,saurabhjn76/sympy,shikil/sympy,aktech/sympy,jaimahajan1997/sympy,liangjiaxing/sympy,chaffra/sympy,saurabhjn76/sympy,meghana1995/sympy,iamutkarshtiwari/sympy,oliverlee/sympy,pandeyadarsh/sympy,shipci/sympy,sunny94/temp,sampadsaha5/sympy,drufat/sympy,cswiercz/sympy,emon10005/sympy,Titan-C/sympy,MridulS/sympy,beni55/sympy,lidavidm/sympy,abloomston/sympy,lidavidm/sympy,Designist/sympy,diofant/diofant,maniteja123/sympy,cccfran/sympy,kevalds51/sympy,pbrady/sympy,madan96/sympy,Designist/sympy,skidzo/sympy,AkademieOlympia/sympy,MechCoder/sympy,iamutkarshtiwari/sympy,rahuldan/sympy,debugger22/sympy,Arafatk/sympy,cswiercz/sympy,shipci/sympy,pandeyadarsh/sympy,asm666/sympy,Shaswat27/sympy,emon10005/sympy,atreyv/sympy,rahuldan/sympy,iamutkarshtiwari/sympy,wanglongqi/sympy,Curious72/sympy,Davidjohnwilson/sympy,mafiya69/sympy,Curious72/sympy,hrashk/sympy,Arafatk/sympy,hargup/sympy,Gadal/sympy,mafiya69/sympy,abhiii5459/sympy,atsao72/sympy,liangjiaxing/sympy,ga7g08/sympy,kaichogami/sympy,AkademieOlympia/sympy,lidavidm/sympy,wyom/sympy,toolforger/sympy,mcdaniel67/sympy,kaushik94/sympy,Curious72/sympy,sahmed95/sympy,abhiii5459/sympy,hrashk/sympy,ga7g08/sympy,liangjiaxing/sympy,shikil/sympy,jamesblunt/sympy,kaichogami/sympy,farhaanbukhsh/sympy,kumarkrishna/sympy,yashsharan/sympy,cccfran/sympy,garvitr/sympy,vipulroxx/sympy,yukoba/sympy,grevutiu-gabriel/sympy,shikil/sympy,Gadal/sympy,kaichogami/sympy,oliverlee/sympy,wanglongqi/sympy,AkademieOlympia/sympy,kmacinnis/sympy,chaffra/sympy,madan96/sympy,VaibhavAgarwalVA/sympy,mafiya69/sympy,wyom/sympy,cswiercz/sympy,yashsharan/sympy,kaushik94/sympy,wanglongqi/sympy,MridulS/sympy,hrashk/sympy,atreyv/sympy,Mitchkoens/sympy,asm666/sympy,lindsayad/sympy,bukzor/sympy,pbrady/sympy,sahmed95/sympy,lindsayad/sympy,VaibhavAgarwalVA/sympy,beni55/sympy,vipulroxx/sympy,jamesblunt/sympy,Mitchkoens/sympy,moble/sympy,Davidjohnwilson/sympy,asm666/sympy,atsao72/sympy,grevutiu-gabriel/sympy,aktech/sympy,Sumith1896/sympy,AunShiLord/sympy,jerli/sympy,sahmed95/sympy,jbbskinny/sympy,madan96/sympy,toolforger/sympy,sunny94/temp,skidzo/sympy,sampadsaha5/sympy,vipulroxx/sympy,drufat/sympy,VaibhavAgarwalVA/sympy,kevalds51/sympy,meghana1995/sympy,souravsingh/sympy,postvakje/sympy,aktech/sympy,ga7g08/sympy,drufat/sympy,farhaanbukhsh/sympy,mcdaniel67/sympy,postvakje/sympy,moble/sympy,kmacinnis/sympy,beni55/sympy,Sumith1896/sympy,jbbskinny/sympy,Designist/sympy,souravsingh/sympy,jbbskinny/sympy,skirpichev/omg,AunShiLord/sympy,Vishluck/sympy,kaushik94/sympy,ahhda/sympy,yashsharan/sympy,Davidjohnwilson/sympy,wyom/sympy,jerli/sympy,garvitr/sympy,shipci/sympy,dqnykamp/sympy,saurabhjn76/sympy,ahhda/sympy,ChristinaZografou/sympy,abloomston/sympy,sahilshekhawat/sympy,debugger22/sympy,MechCoder/sympy,rahuldan/sympy,debugger22/sympy,Shaswat27/sympy,hargup/sympy,atsao72/sympy,mcdaniel67/sympy,postvakje/sympy,abhiii5459/sympy,jaimahajan1997/sympy,pbrady/sympy,bukzor/sympy,Sumith1896/sympy,pandeyadarsh/sympy,emon10005/sympy,atreyv/sympy,yukoba/sympy,sahilshekhawat/sympy,Vishluck/sympy,kevalds51/sympy,MechCoder/sympy,yukoba/sympy,Gadal/sympy,jaimahajan1997/sympy,ChristinaZografou/sympy,chaffra/sympy,oliverlee/sympy,Arafatk/sympy,abloomston/sympy,garvitr/sympy,Shaswat27/sympy,dqnykamp/sympy,farhaanbukhsh/sympy,dqnykamp/sympy,Titan-C/sympy,jerli/sympy,ChristinaZografou/sympy,hargup/sympy,kmacinnis/sympy,toolforger/sympy,kumarkrishna/sympy,maniteja123/sympy,moble/sympy,skidzo/sympy,AunShiLord/sympy,kumarkrishna/sympy,bukzor/sympy,souravsingh/sympy,sampadsaha5/sympy,cccfran/sympy